I started my computer today without being able to connect to the internet for some very odd reason. As the title says, that is the name of problem that the Network and Sharing Center says on Win7. Its weird though, because everytime I trouble shoot the problem it cycles through two answers. One time it will be the name of the problem above, and the next time it will say that my perfectly fine ethernet cable in not properly plugged in or may be broken. It also showed a 3rd problem sometimes saying my Realteak PCIe GEB Family Controller (gigabyte ethernet card) drive was bad so I reinstalled that and the error went away but not the problem. If you have any questions about my situation that could help you, then do please ask. I'm running Win7 64bit and connecting to the internet through a ethernet cable obviously. My Linksys router is fine, and I'm using another computer in the house to type up this problem here. Any help is very appreciated. Thanks.
Update: A person on Superuser said that my DHCP is broken and that another NIC wont fix anything.
Answer by WinZatPhail · Aug 25, 2011 at 12:41 PM
Turn off the computer that's not working, the one that is, anything else connected to your network (switches, hubs, xbox, w/e), your router, and your modem (if you have one...). Wait at least 5 minutes, then fire them up in the order they come into your home, EX. modem, then router, then switch, then pcs.
Even with one or more working computer, it can still be the router. I don't even know how many times I've seen this with a client's network. Try this, then post back.
Answer by Greg De Santis · Aug 25, 2011 at 10:01 PM
Have you tried some simple things first, like:
Reversing your Ethernet cable (plug the end that is in the router into the computer's Ethernet card, and the end that was in the PC into the router).
Or have you tried a different port on the router?
Try another Ethernet wire.
Disabling / enabling the Network card in device manager.
Or deleting the Network card, rebooting and let Windows find the card and reload the device drivers.
Each one of these things have helped me in the past more than once.
Answer by archaeme · Aug 26, 2011 at 04:28 PM
Did you reset your network card? It might be able to obtain a new IP address.
If your IP isn't 192.168.x.x and you have a router, reset it. I had a problem like that, and once I pressed reset, it worked normally.